Palladium-catalyzed cleavage of the Me–Si bond in ortho-trimethylsilyl aryltriflates: synthesis of benzosilole derivatives from ortho-trimethylsilyl aryltriflates and alkynes
2-trimethylsilylphenylboronic acid with internal alkynes is developed for the synthesis of 2,3-disubstituted benzosilole derivatives. A range of functional groups, encompassing ketones, esters, amines, aryl bromides, and heteroarenes, are compatible, which provides rapid access to diverse benzosiloles. Sequential 2-fold coupling enablesmodularsynthesis of asymmetrically substituted 1,5-dihydro-1,5-disila-s-indacene
Palladium-catalyzed cleavage of the Me–Si bond in ortho-trimethylsilyl aryltriflates: synthesis of benzosilole derivatives from ortho-trimethylsilyl aryltriflates and alkynes
作者:Tianhao Meng、Kunbing Ouyang、Zhenfeng Xi
DOI:10.1039/c3ra42910e
日期:——
An efficient Pd-catalyzed cleavage of the MeâSi bond in ortho-trimethylsilyl aryltriflates was realized and synthetically applied. Most of the commercially available ortho-trimethylsilyl aryltriflates could undergo the Pd-catalyzed intermolecular coupling with alkynes via cleavage of the MeâSi bond, which represents a new reaction pattern of ortho-trimethylsilyl aryltriflates. Potassium bromide (KBr) was found effective for this process. A variety of benzosilole derivatives were thus generated in high yields.